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| author | Wang Zhi <zhi.wang@windriver.com> | 2011-08-17 04:39:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-22 22:38:52 +0200 |
| commit | d0f2fb2500b1c5fe4967eb45d8c9bc758d7aef80 (patch) | |
| tree | 396bb27c52730fc3f53547c5232f8f9ca428801c /kernel | |
| parent | USB option driver add PID of Huawei Vodafone K4605 (diff) | |
| download | linux-d0f2fb2500b1c5fe4967eb45d8c9bc758d7aef80.tar.xz linux-d0f2fb2500b1c5fe4967eb45d8c9bc758d7aef80.zip | |
USB: EHCI: Do not rely on PORT_SUSPEND to stop USB resuming in ehci_bus_resume().
From EHCI Spec p.28 HC should clear PORT_SUSPEND when SW clears
PORT_RESUME. In Intel Oaktrail platform, MPH (Multi-Port Host
Controller) core clears PORT_SUSPEND directly when SW sets PORT_RESUME
bit. If we rely on PORT_SUSPEND bit to stop USB resume, we will miss
the action of clearing PORT_RESUME. This will cause unexpected long
resume signal on USB bus.
Signed-off-by: Wang Zhi <zhi.wang@windriver.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions